CN101489460A - Cyclone separation device - Google Patents

Abstract

The invention provides cyclonic separating apparatus (100) for separating particles from a dirt-bearing airflow, the apparatus comprising a cyclone (102) for separating and collecting dirt from the dirt-bearing airflow, the cyclone (102) having an air inlet (110), an air outlet (126), a longitudinal axis (X-X) and a wall (104) comprising a first portion (106) and a second portion (108) spaced further from the longitudinal axis (X-X) than the first portion (106), the first and second portions (106, 108) being axially spaced along the longitudinal axis (X-X). The cyclone (102) further comprises at least one lip (114) extending from the first portion (106) of the wall (104) into the portion of the cyclone (102) surrounded by the second portion (108) of the wall (104). By providing the cyclone (102) with a two-part wall (104) having different sizes and a lip (114) extending from the smaller size part (106) to the larger size part (108), the risk of blockage due to re-entrainment and movement of dirt within the cyclonic separating apparatus (100) is reduced.

Description

Cyclone separator

Technical field

The present invention relates to cyclone separator, it is used in particular for but is not specifically designed to vacuum cleaner.More particularly the present invention relates to be used for hand-held vacuum cleaner

Background technology

Cyclone separator can be known from for example EP0042723.The document discloses a kind of vacuum cleaner, and it utilizes anti-stream cyclone (reverse flow cyclone) separating particles from air stream.This cyclone comprises the second efficient cyclone device in the first poor efficiency cyclone and the first cyclone downstream.The air that carries foul and dust passes inlet and enters first cyclone and advance along the downward spiral path of the inner periphery of first cyclone.Centrifugal action on the dust that carries, with it from flow separation.When after flow separation, dust accumulation is in the bottom of first cyclone.After arriving the bottom of first cyclone, airflow reverses direction.The air-flow of part cleaning moves up and returns first cyclone and leave first cyclone by outlet.Usually the outlet at first cyclone is provided with so-called cover.This cover comprises wall, and this wall has the through hole that passes this cover in a large number, and air-flow passes this through hole to arrive second cyclone.Air enters second cyclone then and advances in second cyclone internal along spiral path.Smaller particles is separated from air-flow in the mode that is similar to first cyclone and is deposited over the gatherer that is positioned under second cyclone.The air of cleaning upwards flows back to the inside of second cyclone then and passed pre-motor filter, motor and post-motor filter in succession before discharging vacuum cleaner.

By accident, in this configuration, some is entrained in the Returning flow again from the dust of flow separation.This is not desired, because dust can cause some part obstruction, for example Zhao through hole of cyclone separator.The through hole that blocks cover will reduce the operating efficiency of cyclone separator.

Delay for the dust in first cyclone that improves the cover upstream is known that to being covered with and puts the flange that is projected in first cyclone.The example of such flange is shown in the EP0800359 and describe.This flange reduces to cover the danger that through hole gets clogged and seals.

But, this scheme for perpendicular towards cyclone separator (for example vertical machine) useful in, its for be not vertically towards cyclone separator then efficient is lower.Such situation for example can appear at when cyclone separator and be configured to when angled with the vertical direction of cyclone maybe to form when controlling the part of hand-held vacuum cleaner at any angle by the user when this cyclone.Under these situations, the danger that the dust that existence separates moves towards the outlet of first cyclone.This is not desired, because dust can block the through hole or the inlet of cover.

Be known that the projection that setting extends internally on the wall of cyclone.EP0728435 and GB2363744 show a kind of bottom inwardly outstanding endless loop or rib on every side that is positioned at the inner surface of such cyclone.In this two prior aries open, it instructs these features to help to prevent that dust is entrained in the air-flow of part cleaning again.But for example the inwardly outstanding rib on the inwall of cyclone or the introducing of enclosing such element have also brought undesired effect.For example, these elements can be in cyclone turbulization, it can disturb the precipitation of dust in the mode of not expecting.And the introducing of these elements can reduce the separative efficiency of cyclone.

Summary of the invention

The purpose of this invention is to provide a kind of cyclone separator, it has reduced the risk of dispersing again from the foul and the dust of flow separation, minimizes the adverse effect to the separative efficiency of cyclone separator simultaneously.Another purpose provides a kind of cyclone, its minimized when cyclone separator be moved leave vertically towards the time risk of having dispersed again from the dust of flow separation.

The invention provides a kind of being used for from the cyclone separator of the flow separation particle that carries foul and dust, comprise from flow separation of carrying foul and dust and the cyclone of collecting foul and dust, this cyclone has air intake, air outlet slit, longitudinal axis and wall, this wall comprises first and second portion, this second portion is more spaced apart with longitudinal axis further than first, this first and second part longitudinally axis is axially spaced apart, wherein this cyclone also comprise at least one first from wall extend to cyclone by the second portion of wall around part in flange.By for cyclone is provided with wall, this wall has two parts of different size and extends to flange in the major part from smaller portions, because the danger of dispersing and moving the obstruction that causes of foul in the cyclone separator and dust is lowered.

Preferably, the first of cyclone is columniform and has first radius.More preferably, the second portion of cyclone is columniform and has second radius to small part.

Preferably, the straight basically extension of the first of flange-shape wall-forming.This arrangement minimises flange be projected in the air-flow, also reduced the danger that the dust that separated in the cyclone separator disperses again simultaneously.

Preferably, cyclone separator comprises at least one other cyclone and gatherer, and it is positioned at the downstream of outlet, and this at least one other cyclone is configured to the dust that separates is deposited in the gatherer.More preferably, gatherer has longitudinal axis, wall and at least one other flange, and this flange extends in the gatherer from the wall of gatherer.By the flange that extends from the wall of gatherer is set, the fine dust that is deposited in the gatherer is lowered in the danger of dispersing and move.

Description of drawings

Embodiments of the invention will be illustrated with reference to the accompanying drawings, wherein:

Fig. 1 shows the hand-held vacuum cleaner that comprises according to the cyclone separator of the first embodiment of the present invention;

Fig. 2 is the cross section from the longitudinal axis intercepting of the cyclone separator of the hand-held vacuum cleaner of Fig. 1;

Fig. 3 is the cross section of cyclone separator of the hand-held vacuum cleaner of Fig. 1;

Fig. 4 to 11 is the schematic diagrames according to the alternative embodiment of the part of cyclone separator of the present invention.

The specific embodiment

Fig. 1 shows hand-held vacuum cleaner 10.Hand-heldvacuum cleaner 10 hasmain body 12, and it takes up motor and fan unit (not shown).Main body 12 also comprises for example battery of power supply 14.Handle 16 is arranged on themain body 12 to operate hand-held vacuum cleaner inuse.Cyclone separator 100 is connected to main body 12.Inlettube 18 extends from the part away frommain body 12 of cyclone separator 100.Dirty air intake 20 is formed on the end of inlet tube 18.Brush tool 22 is slidably mounted in the end of inlet tube 18.One group ofexhaust outlet 24 is arranged on themain body 12, to discharge air from hand-heldvacuum cleaner 10.

Thecyclone separator 100 that forms the part of hand-heldvacuum cleaner 10 is shown specifically in Fig. 2 and 3.Thiscyclone separator 100 comprisescyclone 102, and it has longitudinal axis X-X and wall 104.Wall 104 comprises first 106 and second portion 108.Inlet 110 be formed on thewall 104 and the first that is provided so thatwall 104 between thesecond portion 108 ofinlet 110 and wall 104.Inlet 110 communicates withdirty air intake 20 and forms path between the inside ofinlet tube 18 and cyclone 102.Air intake 110 is provided withcyclone 102 tangently, so that the air that enters is forced to along advancing around the spiral path ofcyclone 102 inside.

The first 106 ofwall 104 is columniform basically and for two-piece type.This make these two can be separated, with thecleaning cyclone 102 inside.Yet this is not substantial for purposes of the invention.Thesecond portion 108 ofwall 104 further leaves longitudinal axis X-X than the first 106 of wall 104.The second portion ofwall 104 comprisesshoulder 112 and columnar portion 113.Flange 114 from the first ofwall 104 extend to by the second portion of thewall 104 ofcyclone 102 around the space in.Flange 114 forms the straight basically extension of the first of wall 104.Flange 114 act on hereinafter explanation.

An end ofbase portion 116 sealing cyclones 102.Base portion 116 is installed in the lower end of thesecond portion 108 ofwall 104 pivotally by hinge means.Base portion 116 is maintained at closed position (seeing Fig. 1 to 3) bygrab 120.

Cover 121 is positioned at the inside of thewall 104 of cyclone 102.Cover 121 comprises thecylindrical wall 122 with a plurality of through holes 123.Cover 121outlets 124 around cyclone 102.Outlet 124 provides path betweencyclone 102 and other cyclone assembly 126.Flange 128 is arranged on the bottom of cover 121.Flange 128 has a plurality of through holes, and but it is designed for and allows air to pass can catch foul and dust.

Other cyclone assembly 126 comprises parallel a plurality ofother cyclones 130 that are provided with, and in this example, is provided with six other cyclones 130.Eachother cyclone 130 has theair intake 132 and theoutlet 134 of tangential setting.Eachair intake 132 andair outlet slit 134 all are positioned at first end of each other cyclone 130.Taperedopening 136 is positioned at second end of each other cyclone 130.Thetapered opening 136 of eachother cyclone 130 is tilted with respect to the longitudinal axis (not shown) of correspondingother cyclone 130, as shown in Figure 3.Thetapered opening 136 of eachother cyclone 130 communicates with thepassage 138 that thewall 130 ofcover 121 inside limits.

Gatherer 142 is positioned at the lower end of passage 138.Gatherer 142 comprises frustoconical first 144 and cylindrical second portion 146.The inside ofgatherer 142 by the lateral ring of first and second parts 144,146 ofbase portion 116 andgatherer 142 around.

Other flange 148 extend togatherer 142 by cylindricalsecond portion 146 around part in.Thisother flange 148 comprisesfrustoconical part 148a andcylindrical part 148b, and the sidepiece that this cylindrical part is arranged essentially parallel to thesecond portion 146 ofgatherer 142 extends.Thisother flange 148 act on hereinafter explanation.

Eachoutlet 134 ofother cyclone 130 all communicates with pipe 150.Pipe 150 provides the air flow path of the other parts fromcyclone separator 100 to hand-held vacuum cleaner 10.What be positioned atpipe 150 downstream is pre-motor filter 152.Pre-motorfilter 152 comprises porous material such as foam.

In use, motor and fan unit are extracted into the air that carries dust in thedirty air intake 20, passinlet tube 18 and enter cyclone separator 100.The air that carriesdust passes inlet 110 and enters cyclone separator 100.Because the tangential setting ofinlet 110, air-flow is forced to along advancing around the spiral path ofwall 104 inside.Bigger dust granule is by the separated by cyclonic motion around wall 104.These particles are collected in thebase portion 116 ofcyclone 102 then.The separation of bigger particle occur in bycyclone 102 by the first ofwall 104 around the zone andcyclone 102 byflange 114 around the zone.The particle aggregation that separatescyclone 102 by thesecond portion 108 ofwall 104 around part.

The air-flow of part cleaning upwards flow back into the inside ofcyclone 102 then and leavescyclone 102 via the through hole on the cover 121.In case air-flow passescover 121, it entersoutlet 124 and is cut apart between thetangential inlet 132 of eachother cyclone 130 therefrom.Eachother cyclone 130 all has the little diameter than cyclone 102.Therefore,other cyclone 130 can separate littler dust granule thancyclone 102 from the air-flow that part cleans.The dust that separates leavesother cyclone 130 via tapered opening 136.After this, the dust of separation is downwards bypassage 138 and enter gatherer 142.The dust that separates finally is deposited in the bottom ofgatherer 142.

The air of cleaning upwards flows back toother cyclone 130 then, leavesother cyclone 130 and enterspipe 150 by air outlet slit 134.The air of cleaning passed pre-motorfilter 152, motor and fan unit and post-motor filter from managing 150 orders then passexhaust outlet 24 discharges fromvacuum cleaner 10 before.

Like this, in use, hand-heldvacuum cleaner 10 will be controlled with various orientation.It may even be reversed in use.Whencyclone separator 100 by when vertical direction tilts, may be trapped in the endless groove towardsinlet 110 and the dust that separates that covers 121 larger proportions that move, this endless groove is formed by thesecond portion 108 offlange 114 and wall 104.In addition, the existence of above-mentioned groove can be auxiliary to some extent to formation stationary point and eddy current in the bottom of cyclone 102.This prevents further that the dust that has separated from dispersing again and enters the air-flow of backflow.

Aboutgatherer 142, groove is formed between thesecond portion 146 andother flange 148 of gatherer 142.When hand-heldvacuum cleaner 10 by when vertical direction tilts, the part dust that this groove can prevent to block the other parts oftapered opening 136 orcyclone 130reenters passage 138.

Pivot aroundhinge 118 to allowbase portion 116 by discharginggrab 120, so that the dust that separates drops fromcyclone separator 100,cyclone 102 andgatherer 142 can be by the while emptyings.

Flange 114 can be taked structure or the shape different with first embodiment with other flange 148.Fig. 4 to 11 shows the flange of eight other replacement structures in the scope of the invention.In these views, except the overall shape of flange all is omitted with details the wall part that links to each other.These structures of flange can be used to each flange of cyclone or be used for other flange of gatherer.

Fig. 4 shows the second embodiment of the present invention.In this embodiment,cyclone separator 200 comprisesflange 202, this flange from the first 204 of wall extend to by thesecond portion 206 of wall around the zone in.Flange 202 has a plurality of through holes, but it allows air to pass to stop bigger dust granule.In addition,flange 202 is identical with above-mentionedflange 114.

Fig. 5 shows the third embodiment of the present invention.In this embodiment,cyclone separator 250 comprisesflange 252, its frustoconical first 254 from wall extend to by thesecond portion 256 of wall around the zone in.Second portion 256 parts of wall be truncated cone shape and the part be columniform.

Fig. 6 shows the fourth embodiment of the present invention.(it illustrates not in scale) in this embodiment, cyclone separator 300 have longitudinal axis X '-X ' and compriseflange 302, this flange from the cylindrical first 304 of wall extend to by the second portion of wall around thezone.Flange 302 extends internally with respect to longitudinal axis X '-X ' from the first of wall angledly.

Fig. 7 shows the fifth embodiment of the present invention.(it illustrates not in scale) in this embodiment, cyclone separator 350 has longitudinal axis X "-X " and compriseflange 352, this flange from the cylindrical first of wall extend to by the second portion of wall around the zone in.Flange 352 from the first of wall with respect to longitudinal axis X "-X " stretch out angledly.

Fig. 8 shows the sixth embodiment of the present invention.In this embodiment,cyclone separator 400 comprisesflange 402, its cylindrical first 404 from wall extend to by thesecond portion 406 of wall around the zone in.Flange 402 comprises two parts: first forms the straight basically extension of the first 404 of wall, and second portion forms and the rectangular annulus that extends internally of first.

Fig. 9 shows the seventh embodiment of the present invention.In this embodiment, cyclone separator 450 comprises first and second parts 454,456 of flange 452 and wall.This embodiment is identical with the 6th embodiment except annulus stretches out.

Figure 10 shows the eighth embodiment of the present invention.In this embodiment,cyclone separator 500 comprisesflange 502, this flange from the cylindrical first 504 of wall extend to by thesecond portion 506 of wall around the zone in.Flange 502 comprises two parts: first extends internally, and second portion is parallel to first's 504 extensions of wall.

Figure 11 shows the ninth embodiment of the present invention.In this embodiment,cyclone separator 550 comprises the first 552 of wall, and this part has cylindrical part andannulus.Flange 554 from the annulus of first 552 extend to by thesecond portion 556 of wall around the zone in.

Configuration shown in Fig. 4-11 is that the number, shape and the structure that are used to represent flange all can change.Should be understood that other configuration also is possible.For example, other cyclone assembly can comprise the cyclone of any amount.Alternatively, can there be other cyclone assembly, and replaces with filter or other separating medium.

Can not need the flange on gatherer or the gatherer.Importantly there is a cyclone, the flange that it has the two-part wall of band different size and extends to major part from smaller portions.

Flange in the foregoing description all extends around the whole circumference of the wall of cyclone.But, be not must be such.Flange can be only extends around the part circumference of the wall of cyclone.Alternatively, a plurality of flanges can be set, its each all partly extend around the circumference of the wall of cyclone.

Flange may extend into by the second portion of the wall of cyclone around the smaller portions in zone, or alternatively, flange can further extend in the cyclone.The flange of any amount can be set, for example a plurality of concentric lips can be set.

Claims (17)

1. cyclone separator, be used for from carrying the flow separation particle of foul and dust, this device comprises and being used for from flow separation of carrying foul and dust and the cyclone of collecting foul and dust, this cyclone has air intake, air outlet slit, longitudinal axis and wall (cyclonic separation occurs on this wall), this wall comprises first and than the second portion of this first further from this longitudinal axis, this first and second part is axially separated along this longitudinal axis, wherein this cyclone also comprises at least one flange, this flange from the first of this wall extend to by the second portion of this wall around the part of cyclone in.

2. cyclone separator as claimed in claim 1, the first of wherein said wall is columniform and has first radius.

3. cyclone separator as claimed in claim 1 or 2, being columniform and having second radius to small part of the second portion of wherein said wall.

4. as claim 1,2 or 3 described cyclone separators, the first of wherein said wall is between the second portion of described air intake and described wall.

5. the described cyclone separator of arbitrary as described above claim, wherein said at least one flange has a plurality of through holes that pass this flange.

6. the described cyclone separator of arbitrary as described above claim, wherein said at least one flange forms the straight basically extension of the first of described wall.

7. as each described cyclone separator of claim 1-5, the end of wherein said at least one flange than described first from the spaced apart bigger distance of described longitudinal axis.

8. as each described cyclone separator of claim 1-5, the end of wherein said at least one flange than described first from the spaced apart littler distance of described longitudinal axis.

9. as claim 7 or 8 described cyclone separators, wherein said at least one flange extends from the first of described wall with an angle with respect to described longitudinal axis.

10. the described cyclone separator of arbitrary as described above claim wherein is provided with a flange, and this flange extends around the circumference of described wall.

11. the described cyclone separator of arbitrary as described above claim, also comprise gatherer and at least one other cyclone, this gatherer is positioned at the downstream of described air outlet slit, and this at least one other cyclone is set for foul that separates and dust deposit are arrived in this gatherer.

12. cyclone separator as claimed in claim 11, wherein said gatherer have longitudinal axis, wall and at least one other flange, this other flange extends in this gatherer from the wall of described gatherer.

13. cyclone separator as claimed in claim 12, wherein said or each other cyclone all have inlet and tapered opening, and described at least one other flange extends the tapered opening of leaving described at least one other cyclone.

14. as claim 12 or 13 described cyclone separators, at least a portion of wherein said at least one other flange is parallel to the part of the wall of described gatherer.

15. the described cyclone separator of any embodiment with reference to the accompanying drawings.

16. comprise the vacuum cleaner of the cyclone separator of arbitrary aforementioned claim.

17. vacuum cleaner as claimed in claim 16, wherein said vacuum cleaner is a hand-held vacuum cleaner.

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